A continuously operating dilution microcryostat

作者：Edelman V S^*

来源：Instruments and Experimental Techniques, 2012, 55(1): 145-148.

DOI：10.1134/S0020441212010277

A dilution microcryostat based on the technology of sorption evacuation of He-3 and He-4 and condensation evacuation of a He-3 + He-4 mixture in a dilution cycle is described. A low temperature of similar to 0.1 K during regeneration of sorbers is continuously maintained owing to the high specific heat of the cryostat unit, in which circulating helium condensates. The cryostat is manufactured in the form of an insert in an industrial 35-L portable Dewar flask for liquid helium. A cold sample holder is positioned in the upper part of the device, thus facilitating the access to it. The complete volume of liquid helium suffices for 6-7 days of operation including the consumption of He-4 for preliminary cooling of the cryostat from nitrogen temperature. During this period, a low temperature of the sample holder can be maintained with an accuracy of similar to 1 mK. The device operates under computer control.

• 出版日期2012-1